AIX L2 and L3 Interview Questions

• What is the configuration file for paging device ?

• What is Audit file and location ?

• How to activate the paging ?

• What is sysdump ?

• How to configure the primary dump ?

• How to delete the sysdump ?

• If one Ethernet adapter fails, How do you replace it in vios server ?

• In NPIV,  4 port adapter are there and one port fails, how do you replace the adapter ?

• What are the policy in HACMP ?

• In HACMP the node is working fine, Did some changes in cluster and synchronized it but it fails and i dont have previous snapshot, How do you get back to normal or previous configuration ?

• In HACMP synchronisation fails but it was locked with synchronisation how to release the lock ?

• Auto mount file which file read ?

• How to set password which never expire ?

• How to move I/O adapter which is in desired mode from one lpar to another lpar ?

• What are the deamons for DLPAR ?

• How to check if the DLPAR is working or not ?

• What is capped & uncapped ?

• What is virtual processor ?

• How to create hmc user ?

• How to login into pesh shell in hmc ?

• What is hscpe in hmc ?

• How to do offline with snapshot migration ?

• When try to Synchronising HACMP i got error , after i rectify that again ill try to Synchronize  but again i get error , How do you troubleshoot this ?

• How to rollback to my pervious configuration without snapshot ?

• One file system mounted in nfs , one client can read and another client cant write anything what is the reason ?

• How will your datavgname ?

AIX Scenario Based & Troubleshooting Questions

• There are 4 pv’s in a vg , which pv’s are got corrupted how would you confirm and how will you resolve this ?

• One PV is showing as a missing state in a vg how will you recover it?

• How will you confirm a vg is normal or big vg and scalable vg?

• How will you convert normal vg to big vg ?

• I have a pv with 1 TB (1024 GB), I want to create  a normal vg by using this pv,  how much PP size it will take, explain this scenario?

• What is the significance of t-factor?

• How will you convert jfs type filesystem to jfs2 type filesystem?

• What is the significance of persistent ip in the HACMP cluster and Which version you are using in HACMP cluster? 

• I have 2 node cluster, one of the node in cluster  is down then Persistent ip in that node is pingable or not ?

• I have 2 node cluster, one of my node is down then serviceip is pingable or not and it is accessible or not ?

• I have four node cluster,  one of my base ip is down in accessible  node,  then the service ip is accessible or not, if it is accessible from where it is accessible ?

• In the above scenario the entire network is  down then what is the solution ?

• In one ASMI one lpar is there,  I want to move the same lpar but it has different ASMI, how will you do it? Down time is required ?

• In the above scenario I don’t want downtime then how will you do it?

• What do you check before doing LPM?

• From which Power VM onwards LPM will supports? Is it support for P7 core also?

• In one core my lpar is created with dedicated processor, then it is possible to move to other core by using LPM?

• How will you see the HMC version?

• I have HMC, how will I get the # prompt through HMC?

• By using command line in HMC console the lpar is able to open but through GUI  I cant able to open then how can you troubleshoot it?

• Tell me about your technical background ?

• What are the precautions you have to take before migration?

• Oracle 9i is running after migration from 5.3 to 6.1 , application team is not able to access , what are the possible reasons?

• After migration how do you know migration is successful or not?

• How do you know backup will work or not which is taken before migration ?

• Custer goes into barrier state ?how will u troubleshoot?

• RG goes into error state, it is not going to move ? how will u troubleshoot?

• What is cluster ST_INIT ?

• What is cluster ST_VOTING?

• What is control channel?

• If  VIO server has 4 sea how many control channels are required?

• The adapters which are going into  participate sea have to select check box of one of the field, what is that?

• Why we have select access external network?

• I have created 4 lpars but sea is not created what will happen ?

• How can you increase max processing units value in caped mode?

• One file  with data 10GB  exits,  I have reduced it to 5GB  but still it is showing 7GB?

• npiv configuration?

• Which wwpn will you share with storage team?

• What is the vlan id for the control channel?

• How will you see wwpn numbers after npiv configuration?

• After sharing wwpn number with storage guys they assigned LUN to lpar but it is not appearing at  client side , what are the reasons?

• While restoring the mksysb of one server into another new server, ip address and hostname conflicts are occurred, how will you proceed?

• What is use of user limits file?

• How will you see the wwpn number for running lpar?

• How will you see the wwpn number of new lpar?

• For new lpar how many wwpn number you can find how many wwpn no.s? why they are used for it? 

• How will you convert the jfs filesystem to jfs2 filesystem?

• What are the precautions for vios upgradation?

• While creating the virtual Ethernet adapter for SEA what we have to select for that adapter?

• In dual which is primary?

• After upgradation of vios lpar showing some pv are in missing. To avoid that how will you configure it?

• In HACMP cluster DMS, when it will happen?

• Explain HACMP upgradation?

• In dual vios for sea adapter ha_mode ? 

• If ha_mode is sharing what will happen?

• We have 4 lpars with same vlan , but sea is not configured, what will happen?

Virtual I/O Server (VIOS) Interview Questions :

1. How will you see the HMC version?
2. I have HMC, how will I get the # prompt through HMC?
3. What you are checking before doing LPM?
4. From which Power VM onwards LPM will supports? Is it support for P7 core also?
5. what is the purpose of share attributes in vio's?
6. What is use of user limits file?
7. How will you see the wwpn number for running lpar?
8. How will you see the wwpn number of new lpar?
9. For new lpar how many wwpn number you can find how many wwpn no.s? why they are used for it?
10. What are the precautions for vios upgradation?
11. While creating the virtual Ethernet adapter for SEA what we have to select for that adapter?
12. In dual vio  which is primary? How to know?
13. After up gradation of vios lpar showing some pv are in missing. To avoid that how will you configure it?
14. If ha_mode is sharing what will happen?
15. In dual vios for sea adapter ha_mode ? 
16. what is control channel?
17. if  vio server has 4 sea howmany control channels are required? 
18. The adapters which are going into  participate sea have to select check box of one of the field, what is that? 
19. why we have select access external network?
20. how can you increase max processing units value in caped mode? 
21. npiv configuration? 
22. which wwpn will you share with storage team?
23. what is the vlan id for the control channel? 
24. how will you see wwpn numbers after npiv configuration? 
25. how to move I/O adapter which is in desired mode from one lpar to another lpar
26. what are the demons for DLPAR
27. how to check the DLPAR is working or not
28. what is capped
29. what is uncapped
30. What is virtual processor?
31. how to create hmc user
32. how to login into pesh shell in hmc
33. what is hscpe in hmc
34. What is virtual process?
35. What is capped and uncapped? 
36. What is a micro partition? 
37. What is a virtual memory?

VIOS Scenario & Troubleshooting based Interview Questions :

1. In one ASMI one lpar is there,  I want to move the same lpar but it has different ASMI, how will you do it? Down time is required ?
2. In the above scenario I don’t want downtime then how will you do it?
3. In one core my lpar is created with dedicated processor, then it is possible to move to other core by using LPM?
4. By using command line in HMC console the lpar is able to open but through GUI  I cant able to open then how can you troubleshoot it?
5. One lpar have 3.5 cpu limits as a desired value when iam going to do dlpar from 3.5 to 4 it showing error like u cannot increase this value whatis the reason?
6. If one lpar has 3.5 cpu limits how many minimum and and maximum virtual processors required?

1. What is the active-active cluster?
2. What are the policies in Hacmp?
3. In your cluster what are you using for fallback policy?
4. cluster goes into barrier state ?how will u troubleshoot? 
5. RG goes into error state is not going to move ? how will u troubleshoot?
6. what is cluster ST_INIT ?
7. what is cluster ST_VOTING?
8. What are the RG policies? 
9. What is the startup policy? 
10. What is the fall over policy?
11. Waht is HACMP
12. Policy in HACMP
13. If the RG is in Error what you will do. How will you trouble shoot it
14. How to flush the service IP

IBM HACMP Scenario Based Interview Questions :

1. What is the significance of persistent ip in the HACMP cluster and Which version you are using in HACMP cluster?
2. I have 2 node cluster, one of the node in cluster  is down then Parsistent ip in that node is pingable or not?
3. I have 2 node cluster, one of my node is down then serviceip is pingable or not and it is accessible or not?
4.  have four node cluster,  one of my base ip is down in accessible  node,  then the service ip is accessible or not, if it is accessible from where it is accessible?
5. In the above scenario the entire network is  down then what is the scenario ?
6. In HACMP cluster DMS, when it will happen?
7. HACMP up gradation?
8. How to do offline with snapshot migration
9. When try to Synchronize in hacmp i got error after i rectify that again ill try to Synchronize that is also error
10. how to rollback to my pervious configuration?? Without snapshot
11. In cluster sync is failed and I don’t have latest samp image of it how will u recover it?
12. Cluster vg is locked how will unlock it?
13. Some one done changes in cluster with out using c_spoc like chfs command what you are going to do and how will u recover it?
14. What is the minimum seconds of heart beat interval? 
15. Two node cluster environment. The cluster status is unmanaged stat. This situation one node is failure what will happen?
16. In Hacmp the node is working fine, Did some changes in cluster and synchronize it but it was fails and i dont have previous snapshot, How do you get back to normal or previous configuration. 
17. In Hacmp synchronization fails but it was locked with synchronization how to release the lock.

1. How will you convert the jfs filesystem to jfs2 filesystem?
2. What procedure do you follow while migration?
3. Nimadm consist of how many steps?
4. What is difference between Etherchannel and link aggregation?
5. In Ether channel one switch goes bad, what happen?
6. In Link aggregation one adapter goes bad, what happen?
7. Where you can find user limits?
8. How to know Ethernet adapter is 2 port or 4 port?
9. When user login first time what are the files should be updated?
10. How to delete the datavg already we have a backup?
11. What are the prerequisites for client while doing  migration by using nimadm? 
12. While increasing the filesystem its throws an error?
13. Normal vg creation command?
14. What is quorum?
15. Vg contents what like vgda?
16. How to see the IP address of the server?
17. If issue an ifconfig command can you see the subnetmask ?
18. What is uid and gid?
19. Lv name consist how many max characters?
20. While doing ftp its not allowing more than 3GB, what might be the reason?
21. How to change the fsize of the user?
22. If in vg first pv is failed, if we reboot the server, it will boot or not, in case of mirrored vg?
23. TL upgrade? 
24. Is downtime is required to update TL? 
25. Have you done migration in your environment? 
26. What are the pre-cautions have to take before migration?
27. After migration how do you know migration is successful or not?
28. How do you know backup will work or not which was taken before migration ?
29. Auto mount file which file read ?
30. How to set password never expire ?
31. How will rename your datavgname ?
32. One file system mounted in nfs one client can read another cant write anything what is the reason ?
33. What is the configuration file for paging device ?
34. What is Aduit file and location ?
35. How activate the paging.
36. What is sysdump. 
37. How do configure the primary dump.
38. How you delete the sysdump.
39. what is the meaning histsize,account_locked,rlogin attribute in /etc/security/user? 
40. maxage=13 menas how long the the user can user the passwd?
41. what is mean by wwpn number? how will u see that?
42. Differnce b/w etherchannel and link aggregation? 
43. once tl updation completed if it is not expected level means what will u do? 
44. Diference b/w normal vg ,big vg ,scallable vg? 
45. LVM structure? 
46. how to create the filesystems?how will u proceed? 
47. lv types? 
48. You have one BIG vg..which having 1016 pv.u trying to add one more pv, is it posiible to add one more pv?
49. How will create user?
50. stanza for /etc/passwd?and will it contain?
51. stanza for /etc/security/password?
52. how will create normal vg and meny pv"s having normal vg?
53. how meny types vg's?
54. is it reqiuere downtime to change normal to scalable vg and what will u do?
55. how will u see mac addres?
56. have done TL upgradation tell me the prequisets ?
57. how many types of lv's in aix?
58. how types of vg in aix?
59. how meny pv's having scalable vg?
60. how will change pp size in vg how will do this activity?
61. why your using dump device?
62. How will you convert normal vg to big vg ?
63. How will you conform a vg is normal or big vg and scalable vg?
64. What is the significance of t-factor?
65. How will you convert jfs type filesystem to jfs2 type filesystem?
66. How will you unmirror rootvg?
67. How will you reduce pv in the vg?
68. How many types of vg’s are there?
69. How many types of vg’s are there?
70. what is the max filesystem size of jfs?
71. How will you change the limits?
72. Tell about /etc/passwd and /etc/security/passwd?
73. How to clear the boot record of pv?
74. How will you set the boot record?
75. How will you see the boot bevice?
76. How will you see the bootlist order?